[Jay] hacked a Blu-Ray laser diode into a keychain enclosure. He found a heavy brass keychain light from Lowe’s and stuffed the diode and a larger battery inside. The existing batteries weren ...

[c4r0] steps in this point to bring us his red green blue laser. He dug around inside Blu-ray players and DVD drives until he had a collection of lasers, retractors, and other filters that fit his ...